Works great. Tested a modified Dualshock 4.

Great app. Helped solve an issue with my PS4.
I modded a Dualshock 4 to a permanent inverted X axis on the right anaolg stick, an option widely unavailable. After the mod, the controller wouldn’t pair with my PS4. Always a possibility I could have just messes up the controller, I Googled and found many PS4 owners were having the same problem with brand new controllers, even right out of the box.
My suspicions were correct. The controller is fine and paired with my Mac via bluetooth instantly. I never even hooked it up via usb, just Bluetooth right off the bat. Downloaded this app, to test my mod, and it works. Now if Sony could just get my PS4 to pair with it. That’s quite a bug.
I’ll hang onto this app.

Blake117 about Joystick Show